SPECIAL POLICY: COLD IDLE SPEED REDUCTION
COLD IDLE SPEED REDUCTION (Revision to Time Allowance on Page 2)
VEHICLES AFFECTED: 1985 SAFARI/ASTRO "M" VANS WITH 4.3L ENGINE AND AUTOMATIC TRANSMISSION
Some customers may experience a condition immediately after cold vehicle startup where, by applying the brake pedal, they are unable to completely stop the rear wheels from turning on icy surfaces.
Variables such as rear axle ratios and higher engine rpm while the vehicle is in the cold idle mode can result in increased torque to the rear wheels. These variables, in conjunction with a lightly loaded rear axle, can increase the pedal effort required to stop the rear wheels from spinning on ice when the vehicle is placed in gear. This condition can be effectively addressed by using the service procedure to reduce the cold idle speed of the engine.
VEHICLES INVOLVED
Involved are all 1985 "M" Vans with 4.3L engine and automatic transmission, built within the following VIN breakpoints:
PLANT FROM THROUGH ----- ---- ------- Baltimore (Chev) FB100006 FB190098 Baltimore (GMC) FB500003 FB525257
OWNER NOTIFICATION
Owners of vehicles involved in this Special Policy Adjustment will be notified by General Motors of Canada Limited (see copy of owner letter included with this bulletin).
SPECIAL POLICY ADJUSTMENT
Should this condition occur, General Motors of Canada Limited will repair involved vehicles at no charge for a period of five (5) years , regardless of mileage from the date the vehicle was originally placed in service.
This "SPECIAL POLICY ADJUSTMENT BULLETIN" should be filed in the three ring binder furnished each Dealer by General Motors.
SERVICE PROCEDURE - 1985 MODEL 4.3L CARBURETED ENGINE ----------------- Reduce cold idle speed to 1600 rpm.
1. Remove dash extension.
2. Remove engine cover.
3. Install tachometer. The tachometer (tach) terminal is next to the engine control switch (bat) connector on the distributor cap (Reference Figure No. 1).
NOTICE: The tachometer terminal must never be allowed to touch ground, because damage to the module inside the distributor and/or ignition coil can result.
4. Reduce cold idle speed to 1600 rpm by adjusting the fast idle screw. Refer to tune up label for procedure.
5. Remove tachometer and reinstall engine cover and dash extension.
6. On a clean dry surface, next to the existing tune up label located on the fan shroud, place label P/N 10066488.
PARTS INFORMATION
Labels to show fast idle speed specification change have been shipped directly to the involved Dealers. If additional labels are required, CONTACT YOUR ZONE OFFICE.
WARRANTY CLAIM INFORMATION
A. IDLE SPEED ADJUSTMENT --------------------- When performing the repairs as outlined in this bulletin, submit a warranty claim for credit as follows:
Labour Operation **Time *Net Number Description Allowance Amount --------- ----------- --------- ------ T7395 Adjust idle speed and 0.7 $0.30 install label
** Time Allowance now includes 0.6 hour labour allowance plus 0.1 hour administration allowance.
* The $0.30 identified in the net amount column represents 30% of Dealer Net when parts are furnished no charge by General Motors.
Authorization is not required for claims meeting the criteria outlined in this bulletin.
B. OWNER REIMBURSEMENT ------------------- Claims for Customer reimbursement of previously paid repairs are to be submitted a s a Net Item Dollar Amount On a Warranty claim as follows:
Labour Net Item Operation Dollar Number Amount --------- -------- T7425 $xx.xx
Authorization is required on all claim submissions which fall into the Owner Reimbursement category and this labour operation is to be used for owner reimbursement of idle speed adjustment only.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
